Joke Collection Website - Talk about mood - How to simply refine your own crude soybean oil to make it clearer and smokeless? Thank you very much for your clarity and concreteness!
How to simply refine your own crude soybean oil to make it clearer and smokeless? Thank you very much for your clarity and concreteness!
(1) insoluble solid impurities, such as silt, cake powder, fiber, clay, catalyst, etc.
(2) Colloidal impurities, such as free fatty acids, sterols, vitamin E, pigments, vitamins and gossypol.
(3) Volatile impurities, such as moisture, alcohols, hydrocarbon solvents, odorous substances, etc.
Most impurities are harmful to the quality and storage safety of soybean oil. For example, moisture will not only affect the transparency of oil, but also promote the hydrolysis and rancidity of oil; Free fatty acids affect flavor and promote deterioration; Phospholipids can make oil turbid and produce black precipitate when heated. Blister, bitter taste, etc. ; Various pigments directly affect the color of oil and also promote the rancidity of oil; The existence of colloid, sulfur and phosphorus compounds, Gleditsia sinensis and heavy metal salts makes it difficult to carry out subsequent processes such as deacidification.
Main process flow of soybean oil refining equipment
(1) Degumming of soybean oil: To remove phospholipids, mucus, resin, protein, sugar and trace metals from crude oil, hydration and acid refining are generally adopted.
(2) Deacidification of soybean oil: neutralization with food-grade alkali liquor to remove free fatty acids, acid pigments, sulfides, insoluble impurities and trace metals in oil.
(3) washing soybean oil: washing saponin and water-soluble impurities remaining in the oil during deacidification.
(4) Dehydration of soybean oil: removing water in refined oil by heating and vacuum drying.
(5) Decolorization of soybean oil: various pigments, colloids, oxides, etc. Impurities in oil are removed by using adsorbents such as clay, aluminum silicate and activated carbon.
(6) Deodorization of soybean oil: using the principle of vacuum pumping to remove low molecular odor substances, free fatty acids, monoglycerides, glycolipids, sulfides, thermal decomposition products of pigments, etc. All the oil in the water has been removed.
(7) Dewaxing or degreasing of soybean oil: Freezing, crystallization or wintering crystallization are mainly adopted, and wax grease in oil is removed by fractionation.
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